package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.DishDTO;
import com.sky.dto.DishPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.DishFlavor;
import com.sky.entity.Employee;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishFlavorMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.result.PageResult;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
@Slf4j
public class DishServiceImpl implements DishService {
    @Autowired
    private DishMapper dishMapper;//注入mapper对象
    @Autowired
    private DishFlavorMapper dishFlavorMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;


    //新增菜品和对应的口味
    @Override
    public void saveWithFlavor(DishDTO dishDTO) {
        log.info("数据ddddddddddddddddddddddddd：{}",dishDTO);
        Dish dish = new Dish();

        BeanUtils.copyProperties(dishDTO,dish);
        //插入菜品数据
        dishMapper.insert(dish);
        //获取insert语句生成的主键值
        Long dishId = dish.getId();
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() != 0){
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishId);
            });
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    //菜品分页查询
    @Override
    public PageResult pageQuerty(DishPageQueryDTO dishPageQueryDTO) {
        //调用java提供的工具类直接分页查询
        PageHelper.startPage(dishPageQueryDTO.getPage(),dishPageQueryDTO.getPageSize());
        //调用方法获取分页查询结果
        Page<DishVO> page = dishMapper.pageQuerty(dishPageQueryDTO);
        return new PageResult(page.getTotal(),page.getResult());
    }

    //菜品批量删除   因为关联其他表格所以添加事务进行统一结果返回
    @Override
    @Transactional
    public void deleteBatch(List<Long> ids) {

        for (Long id:ids){
            Dish dish = dishMapper.getById(id);
            if (dish.getStatus().equals(StatusConstant.ENABLE)){//获取起售状态进行比较
                //抛出提前定义好的错误类型
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        }
        //另外一种判断方式：SELECT id FROM dish WHERE id IN (51, 52, 53) AND STATUS = 1
        //可自行实现

        //判断当前菜品是否能够删除---是否被套餐关联了？？
        //select setmeal_id from setmeal_dish where dish_id in (1,2,3,4)
        //根据id获取所有关联菜品的id
        List<Long> setmealIds = setmealDishMapper.getSetmealIdsByDishIds(ids);
        //进行判断 如果返回的id没有关联就可以直接删除 或者为空
        if (setmealIds != null && setmealIds.size() >0 ){
            //说明当前菜品被关联了 不可以被删除返回提前定义好的错误类型
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);

        }
        for (Long id : ids){
            //删除菜品表中的菜品数据
            dishMapper.deleteById(id);
            //删除菜品表中所关联的口味数据
            dishFlavorMapper.deleteByDishId(id);
        }
    }


    //根据菜品id查询所对应的口味数据
    public DishVO getByIdWithFlavor(Long id) {
        //根据id查询菜品数据
        Dish dish = dishMapper.getById(id);

        //根据菜品id查询口味数据
        List<DishFlavor> dishFlavors = dishFlavorMapper.getByDishId(id);//后绪步骤实现

        //将查询到的数据封装到VO
        DishVO dishVO = new DishVO();
        BeanUtils.copyProperties(dish, dishVO);
        dishVO.setFlavors(dishFlavors);

        return dishVO;
    }

    //根据id修改菜品基本信息和对应的口味信息
    @Override
    @Transactional
    public void updateWithFlavor(DishDTO dishDTO) {
        Dish dish = new Dish();
        BeanUtils.copyProperties(dishDTO, dish);

        //修改菜品表基本信息
        dishMapper.update(dish);

        //删除原有的口味数据
        dishFlavorMapper.deleteByDishId(dishDTO.getId());

        //重新插入口味数据
        List<DishFlavor> flavors = dishDTO.getFlavors();
        if (flavors != null && flavors.size() > 0) {
            flavors.forEach(dishFlavor -> {
                dishFlavor.setDishId(dishDTO.getId());
            });
            //向口味表插入n条数据
            dishFlavorMapper.insertBatch(flavors);
        }
    }

    //菜品起售停售

    @Override
    public void startOrStop(Integer status, Long id) {
        Dish build = Dish.builder().status(status).id(id).build();
        dishMapper.startOrStop(build);
    }


    //根据套餐id查询所包含的菜品
    @Override
    public List<Dish> select(Long categoryId) {
        List<Dish> dish = dishMapper.select(categoryId);
        return dish;
    }

    /*@Override
    public DishVO selectById(Long id) {
        DishVO dishVO = dishMapper.selectById(id);
        return dishVO;
    }*/

    /**
     * 条件查询菜品和口味
     * @param dish
     * @return
     */
    public List<DishVO> listWithFlavor(Dish dish) {
        List<Dish> dishList = dishMapper.list(dish);

        List<DishVO> dishVOList = new ArrayList<>();

        for (Dish d : dishList) {
            DishVO dishVO = new DishVO();
            BeanUtils.copyProperties(d,dishVO);

            //根据菜品id查询对应的口味
            List<DishFlavor> flavors = dishFlavorMapper.getByDishId(d.getId());

            dishVO.setFlavors(flavors);
            dishVOList.add(dishVO);
        }

        return dishVOList;
    }

}
